# Stability order of group 17 halides [closed]

Stability of halides decreases down the group since the size increases and charge density decreases, which leads to stability and we get the order of stability as follows:

$$\ce{F-} < \ce{Cl-} < \ce{Br-} < \ce{I-}$$

But while referring to a textbook, I found that the stability of halides of group 17 decreases from top to bottom:

$$\ce{F-} > \ce{Cl-} > \ce{Br-} > \ce{I-}$$

Where did I go wrong?

• If you do not even try to find an answer yourself, do not expect help of others. Trying is more important than avoiding wrong ideas. Nov 26 '21 at 5:25
• Following the recommendation in the comment above is even quite easy, at least if the order is all you are looking for. Nov 26 '21 at 12:12
• By halides of group 17, are there meant interhalogen compounds, or was the original 16 correct? Nov 26 '21 at 19:25